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Poly(AA-co-VPA) hydrogel cross-linked with N-maleyl chitosan as dye adsorbent: Isotherms, kinetics and thermodynamic investigation.
Int J Biol Macromol. 2018 Oct 01; 117:152-166.IJ

Abstract

In this study, hydrogel polymer was synthesized by incorporation of acrylic acid (AA), vinylphosphonic acid (VPA) and N-maleyl chitosan which was prepared through the acylation reaction between maleic anhydride and chitosan. N-maleyl chitosan crosslinked P(AA-co-VPA) hydrogel was utilized for the effective adsorption of crystal violet (CV) and methylene blue (MB) dyes from aqueous solutions. The synthesized hydrogel was characterized by using FTIR, SEM, EDS, TGA-DTA, and DSC methods. The effecting parameters on adsorption of dyes such as initial concentration of dyes, temperature, pH and adsorbent polymer dose were studied. The adsorption isotherm was analyzed in different temperature using Langmuir, Freundlich, Temkin and Redlich-Peterson models and the adsorption data were well described by Redlich-Peterson isotherm model. The adsorption kinetics was analyzed using pseudo first-order, pseudo second-order, intraparticle and film diffusion models in 20, 30, 40 and 50 mg/L of dye solutions and the adsorption data were well described by pseudo-second-order model. The maximum adsorption capacity of the hydrogel polymer for removal of CV and MB in 50 mg/L of dye solutions was 64.56 mg/g and 66.89 mg/g, respectively. Thermodynamic studies recommended that the adsorption process was endothermic and spontaneous. Furthermore, the adsorbent was successfully employed for successive four cycles of adsorption-desorption.

Authors+Show Affiliations

Department of Chemistry, Karaj Branch, Islamic Azad University, P.O. Box: 31485-313, Karaj, Iran.Department of Chemistry, Karaj Branch, Islamic Azad University, P.O. Box: 31485-313, Karaj, Iran. Electronic address: marandi@kiau.ac.ir.Department of Chemistry, Karaj Branch, Islamic Azad University, P.O. Box: 31485-313, Karaj, Iran.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29802921

Citation

Nakhjiri, Mahdi Taghvay, et al. "Poly(AA-co-VPA) Hydrogel Cross-linked With N-maleyl Chitosan as Dye Adsorbent: Isotherms, Kinetics and Thermodynamic Investigation." International Journal of Biological Macromolecules, vol. 117, 2018, pp. 152-166.
Nakhjiri MT, Marandi GB, Kurdtabar M. Poly(AA-co-VPA) hydrogel cross-linked with N-maleyl chitosan as dye adsorbent: Isotherms, kinetics and thermodynamic investigation. Int J Biol Macromol. 2018;117:152-166.
Nakhjiri, M. T., Marandi, G. B., & Kurdtabar, M. (2018). Poly(AA-co-VPA) hydrogel cross-linked with N-maleyl chitosan as dye adsorbent: Isotherms, kinetics and thermodynamic investigation. International Journal of Biological Macromolecules, 117, 152-166. https://doi.org/10.1016/j.ijbiomac.2018.05.140
Nakhjiri MT, Marandi GB, Kurdtabar M. Poly(AA-co-VPA) Hydrogel Cross-linked With N-maleyl Chitosan as Dye Adsorbent: Isotherms, Kinetics and Thermodynamic Investigation. Int J Biol Macromol. 2018 Oct 1;117:152-166. PubMed PMID: 29802921.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Poly(AA-co-VPA) hydrogel cross-linked with N-maleyl chitosan as dye adsorbent: Isotherms, kinetics and thermodynamic investigation. AU - Nakhjiri,Mahdi Taghvay, AU - Marandi,Gholam Bagheri, AU - Kurdtabar,Mehran, Y1 - 2018/05/23/ PY - 2018/04/17/received PY - 2018/05/14/revised PY - 2018/05/20/accepted PY - 2018/5/29/pubmed PY - 2018/11/15/medline PY - 2018/5/27/entrez KW - Crystal violet KW - Dye adsorption KW - Hydrogel polymer KW - Isotherm KW - Kinetic KW - Methylene blue SP - 152 EP - 166 JF - International journal of biological macromolecules JO - Int. J. Biol. Macromol. VL - 117 N2 - In this study, hydrogel polymer was synthesized by incorporation of acrylic acid (AA), vinylphosphonic acid (VPA) and N-maleyl chitosan which was prepared through the acylation reaction between maleic anhydride and chitosan. N-maleyl chitosan crosslinked P(AA-co-VPA) hydrogel was utilized for the effective adsorption of crystal violet (CV) and methylene blue (MB) dyes from aqueous solutions. The synthesized hydrogel was characterized by using FTIR, SEM, EDS, TGA-DTA, and DSC methods. The effecting parameters on adsorption of dyes such as initial concentration of dyes, temperature, pH and adsorbent polymer dose were studied. The adsorption isotherm was analyzed in different temperature using Langmuir, Freundlich, Temkin and Redlich-Peterson models and the adsorption data were well described by Redlich-Peterson isotherm model. The adsorption kinetics was analyzed using pseudo first-order, pseudo second-order, intraparticle and film diffusion models in 20, 30, 40 and 50 mg/L of dye solutions and the adsorption data were well described by pseudo-second-order model. The maximum adsorption capacity of the hydrogel polymer for removal of CV and MB in 50 mg/L of dye solutions was 64.56 mg/g and 66.89 mg/g, respectively. Thermodynamic studies recommended that the adsorption process was endothermic and spontaneous. Furthermore, the adsorbent was successfully employed for successive four cycles of adsorption-desorption. SN - 1879-0003 UR - https://www.unboundmedicine.com/medline/citation/29802921/Poly_AA_co_VPA__hydrogel_cross_linked_with_N_maleyl_chitosan_as_dye_adsorbent:_Isotherms_kinetics_and_thermodynamic_investigation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0141-8130(18)31812-9 DB - PRIME DP - Unbound Medicine ER -